#include <iostream>
#include <vector>
#include <cmath>
#include <algorithm>

// Class to hold line data
class line {
    public:
    int m, b;

    // Returns true if this line intersects y at an x which is an integer
    bool intersects_y(int y)
    {
        // m * x + b = y
        // m * x = y - b
        // x = (y - b) / m
        double x = (y - b) / (double)m;
        return std::floor(x) == x;
    }

    bool operator==(const line& l)
    {
        return m == l.m && b == l.b;
    }
};

// Input a line (m and b)
std::istream& operator>>(std::istream& in, line& l)
{
    in >> l.m >> l.b;
    return in;
}
// Output a line
std::ostream& operator<<(std::ostream& out, const line& l)
{
    out << "y = " << l.m << "x + " << l.b;
    return out;
}

int main() {
    // Use a vector to store the lines
    std::vector<line> lines;

    int num_commands;
    std::cin >> num_commands;

    line tmp;
    int to_check;
    int matches;

    for (int i = 0; i < num_commands; i++) {
        char op;
        std::cin >> op;
        switch (op) {
            case '+':
                // Input a line and put into vector
                std::cin >> tmp;
                lines.push_back(tmp);
                break;
            case '?':
                std::cin >> to_check;
                matches = 0;
                // Check each line in the list
                for (auto l : lines) {
                    if (l.intersects_y(to_check)) {
                        matches += 1;
                    }
                }
                std::cout << matches << 'n';
                break;
            case '-':
                std::cin >> tmp;
                lines.erase(std::find(lines.begin(), lines.end(), tmp));
                break;
        }
    }
    return 0;
}